Charles c



(No Model.)

0. G. CARPENTER, 2d 8v L. A. BROTT.

PROCESS OF MAKING BARRELS OP MUSICAL INSTRUMENTS.

No. 410,875. I Patented Sept. 10, 1889.

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mniba f W M I UNITED STATES PATENT CFFIcE.

CHARLES C. CARPENTER, 2D, AND LUCIEN A. BROTT, OF GROTON, NEW YORK,ASSIGNORS TO L. A. BARBER & CO., OF SAME PLACE.

PROCESS OF MAKING BARRELS OF MUSICAL INSTRUMENTS.

SPECIFICATION forming part of Letters Patent No. 410,875, datedSeptember 10, 1889.

Applicatibn filed February 13, 1889- Sen'al No. 299,765. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES C. CARPEN- TER, 2d, and LUOIEN A. BRoTT, ofGroton, in the county of Tompkins and State of New York, have inventedcertain new and useful Improvements in the Process of Making Rolls forMusical Instruments of all Kinds; and we do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it pertains to make anduse it, reference being had to the accompanying drawings, which formpart of this specification.

Our invention relates to an improvement in the manner of making barrelsor cylinders for music-boxes and other musical instruments for whichrolls can be used to produce the tunes; and it consists in laying out ascale on a flat plate instead of upon a cylinder, and securing to itssurface small raised points to correspond with the tune desired to beproduced, this plate with points being used as a pattern from which amatrix is made to receive the deposit of metal by the electrotypin gprocess, then bending the electrotype so as to form it into a cylinder,as will be more fully described hereinafter.

The object of our invention is to form the barrels or cylinders ofmusical instruments of different kinds by making electrotypes from flatpatterns, and then shaping the electrotypes into barrels or cylinders,for the purpose not only of forming the cylinders much more cheaply andrapidly than has heretofore been done, but by this means securing suchaccuracy as to make the barrels or cylinders interchangeable, either bychanging the whole barrel or the electrotype shell, which may be slippedon or off some suitable core or drum.

Figure 1 represents a flat pattern from which the electrotypes areformed. Fig. 2 is an end view of a cylinder which is formed by bendingthe electrotype into shape.

A represents the flat plate upon which the scale is first laid out, andto which the project ing points are secured in any suitable manner, asindicated by the scale. This plate having the points attached then formsthe pattern from which any suitable number of electrotypes are formed,The electrotypes will in all cases be made sufficiently thin to bereadily formed into a cylinder C, as shown in Fig. 2. Thesecylinders'need not necessarily be made by electrotyping alone, for theymay be formed of rubber, celluloid, or any other material which willanswer the purpose, and they will be cast, blown, or otherwise formedfrom the flat plate which is made in the first instance. If so desired,the process may be carried out by swaging thin copper or other metalwith dies 5 or a thin casting of some metal may be made, the same beingformed into a cylinder, as above described; or the cylinder can be madeby using the above-named fiat plate or pattern in getting a matrix ormold of material, which can be formed into a cylinder previous to theelectrotyping process.

By the construction here described it will readily be seen that afterthe pattern is once formed the cylinders can be very rapidly andcheaplymade and made interchangeable with each other, thus enabling thenumber of tunes played by any one instrument to be increasedindefinitely.

Having thus described our invention, we claim- The process hereindescribed of forming cylinders for musical instruments and othermachines, consisting in forming a flat pattern, then making a thinelectrotype therefrom, and then bending this electrotype into acylinder, substantially as shown and described.

In testimony whereof we aflix our signatures in presence of twowitnesses.

C. C. CARPENTER, 2D. LUCIEN A. BROTT. Witnesses:

W. Q. PIKE, L. A. BARBER.

